Enable the --use-stderr behavior by default and ignore the old option.
Passing through the pipes allows color terminal output and other things
to work as if one ran the native build command directly.
Drop all DefineProperty calls for non-chained properties. Drop the
documentation from the chained ones. The documentation for all
properties is now in Help/prop_*/*.rst files.
We now need only the Usage formatter to support command-line options
that print basic usage, and the supporting indented=>preformatted markup
processor to support CMake message formatting. Drop all other
documentation formatters and move the remaining code up into the top
cmDocumentationFormatter class.
We will no longer support full documentation generation from executables
and will instead generate documentation with other tools. Disable (with
a warning left behind) the command-line options:
--copyright
--help-compatcommands
--help-full
--help-html
--help-man
Drop supporting code. Drop manual sections generation from executables.
Remove internal documentation construction APIs. Drop unused sections
See Also, Author, Copyright, Compat Commands, Custom Modules.
With our modern development workflow it is less likely a property will
be added to C++ code without documentation. This mode only existed to
support the DocTest which had very limited coverage of the properties
anyway.
By default, the message is not issued. If CMAKE_ERROR_DEPRECATED
is on, the message is fatal. If CMAKE_WARN_DEPRECATED is on, the
message is a warning.
Move the cmake::ExecuteCMakeCommand static method and all the static
methods it calls out of the 'cmake' class to a separate 'cmcmd' class.
Build the latter as part of the main cmake executable with cmakemain.cxx
and not in CMakeLib. Drop unused header includes from "cmake.cxx".
By moving this implementation out of cmake.cxx we avoid carrying it
around in all the executables that use class 'cmake'. It is needed only
for the main "cmake -E" functionality.
The feature needs access to all link libraries. In the future that
will only be possible to calculate at generate-time.
Even when the files were generated at configure time, they were
generated after user code in CMakeLists files were generated. No
policy is needed to handle manipulation of the files from CMake
code, because that was never possible.
Return early in cmake::ReportUndefinedPropertyAccesses if there is no
global generator instead of opening a file and leaking the descriptor.
Reported-by: Ömer Fadıl USTA <omerusta@gmail.com>
9a76d83 VS12: Find proper MSBuild for VSProjectInSubdir test
4e5cb39 Merge branch 'master' into vs12-generator
78fdbbc FindBoost: Add -vc120 mangling for VS 12
e99d7b1 VS12: Generate flag tables from MSBuild v120 tool files
77ac9b8 VS12: Add Visual Studio 12 generator (#14251)
Copy cmGlobalVisualStudio11Generator to cmGlobalVisualStudio12Generator
and update version numbers accordingly. Add the VS12 enumeration value.
Add module CMakeVS12FindMake to find MSBuild. Look for MSBuild in its
now-dedicated Windows Registry entry. Teach the platform module
Windows-MSVC to set MSVC12 and document the variable. Teach module
InstallRequiredSystemLibraries to look for the VS 12 runtime libraries.
Teach tests CheckCompilerRelatedVariables, Preprocess, VSExternalInclude,
and RunCMake.GeneratorToolset to treat VS 12 as they do VS 10 and 11.
Inspired-by: Minmin Gong <minmin.gong@gmail.com>
This has been requested, along with a patch, by Shaun Williams
in http://public.kitware.com/Bug/view.php?id=13788 .
It adds a global property AUTOMOC_TARGETS_FOLDER, which can
be used to group the automoc targets together in a folder e.g.
in Visual Studio.
Alex
Through use of libarchive internally we support .zip files as well as
.tar format. The ExternalProject module makes use of this feature.
Document support officially.
It is common to specify a CMAKE_TOOLCHAIN_FILE and get a warning
for using it despite it not being used.
The WarnUnusedCliUnused test relies on the warning being emitted
each time cmake is run on an existing build. That behavior is changed
by this patch to warn only on the first invokation of CMake, and not
on subsequent invokations (because the variable is in the cache with
the same value). For that test, a clean target is added which clears
the cache and cause the warning to be emitted each time.
As the Ninja generator does not support the feature needed to test
this, it is not tested with that generator.
f616ff2 Update generator to use new cmGeneratorTarget api.
674bd6e Merge branch 'master' into sublime-text-2-generator
4760ead Remove ability to generate sublime clang files.
da0898e Correct missing parameter to CMP0018Flags call.
badb40d Merge branch 'master' into sublime-text-2-generator
b3ae61f Merge branch 'master' into sublime-text-2-generator
089d9cc SublimeText 2 Gen: Set the sublimeclang_options_script property.
44c2eee Merge branch 'master' into sublime-text-2-generator
304b885 Sublime Text 2 Gen: Per-source Compile flags are now saved in a separate file.
5b2aa3d SublimeText2 Gen: Fixed the issue where include directory flags used -D
90bcb77 SublimeText2 Gen: Improved use of define, include flags from CMAKE_C(XX)_FLAGS
cc84072 Merge branch 'master' into sublime-text-2-generator
8670cbe Define flags in CMAKE_C(XX)_FLAGS are now included in SublimeClang settings.
d022d4e Merge branch 'master' into sublime-text-2-generator
9cd3e70 Fixed Sublime Text project generation for in-source builds
44f35f7 Added a CMAKE_SUBLIMECLANG_DISABLED variable that disables SublimeClang.
...
Since commit 34c882a9 (Allow VS 7 project Rebuild and Solution Rebuild to
work, 2007-11-10) we use a "CMakeFiles/generated.stamp" and some
associated files in the build tree to avoid re-running CMake when the
inputs have not changed but VS has cleaned the outputs it knows about.
When we do not really need to re-run we restore the generated.stamp file.
The non-re-run case can happen in multiple targets in parallel in VS >= 10
so we must restore the file atomically to avoid races. Write the stamp
file to a random temporary name and then atomically rename it to the real
stamp file.
Since commit fd33bf93 (fix for bug 6102, allow users to change the
compiler, 2007-12-13) we keep an internal ;-list of language compiler
variable and value pairs. Preserve empty values on expansion to ensure
that the key/value pairing remains consistent.
Reject the option by default. It will be implemented on a per-generator
basis. Pass the setting into try_compile project generation. Add cache
entry CMAKE_GENERATOR_TOOLSET and associated variable documentation to
hold the value persistently.
Add a RunCMake.GeneratorToolset test to cover basic "-T" option cases.
Verify that CMAKE_GENERATOR_TOOLSET is empty without -T, that -T is
rejected when the generator doesn't support it, and that two -T options
are always rejected.
In the implementation of "cmake -E cmake_link_script", skip lines from
the input file that are empty or contain only whitespace. Do not try to
run a child with no command line.
This is for consistency throughout cmake. The cmsys version exists
becaues uses of auto_ptr types as return types does not work with
some implementations in ancient compilers.
Pass the name of the requested generator to the generator factory,
which is now responsible to check if it can create a matching
generator for the name. This allows us to add more logic to the
factory in a next step, so that not every possible generator needs
to get registered explicit in cmake::AddDefaultGenerators().
Since ExtraGenerators does not contain items, which are in Generators
too, there is not change in behaviour. The benefit of this change is,
that the lookup in the Generators map is now only done once.
The generator adds all list and source files for each defined
project. The generated project files also include build_system
entries that run the platform-specific make on the generated
Makefiles. A build_system entry is created for each target
that was defined in the CMakeLists.txt files.
At the moment this has only been tested with C/C++ projects.
This reverts commit 5598d9b2a0.
Since commit f1670ab1 (Ninja: don't confuse ninja's rsp files with
nmake's, 2012-09-26) Ninja generator response files are placed in
CMakeFiles/ so the previously existing check already avoids expanding
them.
879fd35 Revert "Move GenerateTargetManifest to cmGeneratorTarget."
6674583 Fix compiler warning with initialization order.
5285458 Add convenience for getting a cmGeneratorTarget to use.
c31f3d9 Add a wrapper for accessing config-specific compile-definitions.
d1446ca Append the COMPILE_DEFINITIONS from the Makefile to all targets.
290e92a Move GetIncludeDirectories to cmGeneratorTarget.
f9146f6 Port cmLocalGenerator::GetTargetFlags to cmGeneratorTarget.
9facfd1 Move GetCreateRuleVariable to cmGeneratorTarget.
78bfee3 Make cmLocalGenerator::AddArchitectureFlags take a cmGeneratorTarget.
4f5384e Move GetLinkInformation to cmGeneratorTarget
987e12e Move GenerateTargetManifest to cmGeneratorTarget.
14bf778 Store cmGeneratorTargets with the makefile.
f428ca2 Add more forwarding API to cmGeneratorTarget.
Add WDExpress to the list of registry search locations. Add VS 11 to
the list of VS versions and corresponding generator names. Fix the
search logic to use the most recent version found under any registry
entry.
Inspired-by: Peter Kümmel <syntheticpp@gmx.net>
At the top of a build tree we configure inside the CMakeFiles directory
files such as "CMakeSystem.cmake" and "CMake<lang>Compiler.cmake" to
save information detected about the system and compilers in use. The
method of detection and the exact results store varies across CMake
versions as things improve. This leads to problems when loading files
configured by a different version of CMake. Previously we ignored such
existing files only if the major.minor part of the CMake version
component changed, and depended on the CMakeCache.txt to tell us the
last version of CMake that wrote the files. This led to problems if the
user deletes the CMakeCache.txt or we add required information to the
files in a patch-level release of CMake (still a "feature point" release
by modern CMake versioning convention).
Ensure that we always have version-consistent platform information files
by storing them in a subdirectory named with the CMake version. Every
version of CMake will do its own system and compiler identification
checks even when a build tree has already been configured by another
version of CMake. Stored results will not clobber those from other
versions of CMake which may be run again on the same tree in the future.
Loaded results will match what the system and language modules expect.
Rename the undocumented variable CMAKE_PLATFORM_ROOT_BIN to
CMAKE_PLATFORM_INFO_DIR to clarify its purpose. The new variable points
at the version-specific directory while the old variable did not.
Otherwise, CTEST_USE_LAUNCHERS can be set to true in a driving ctest
script, and everything looks like it would work and reports 0 build errors,
but actually there can be any amount of errors and they are just not reported.
By adding this check cmake now errors out if CTEST_USE_LAUNCHERS is enabled, but
the RULE properties are not set, which would lead to a not-working ctest run.
Alex
8485208 Ninja: shell escape $(CMAKE_SOURCE_DIR) and $(CMAKE_BINARY_DIR)
df84767 Ninja: add support for OBJECT_OUTPUTS, fix PrecompiledHeader test case
48eb7fc Ninja: Avoid using 'this' in member initializers
bba37dd Ninja: Fix for PDB files with spaces in the path.
ac800f4 Ninja: Constify use of cmCustomCommand
9a0d5a8 Ninja: add /DEF: flag to linker call
d40eebd Ninja: Add a cache option CMAKE_ENABLE_NINJA to enable the ninja generator.
8c63433 Ninja: Add friend struct so it can access the private ConvertToNinjaPath.
dbe3dce Ninja: add .def file support
f1bb08f Ninja: ensure the output dir exists at compile time
7a6b5f4 Ninja: Remove an unnecessary variable
80ff210 Ninja: Use cmSystemTools::ExpandListArgument to split compile/link commands
d2731a3 Ninja: Add a missed license header
eabc9b0 Ninja: CMake: Adapt Ninja generator for per-target include dirs
bada88e Merge branch 'target-include-directories' into ninja-generator
54bd175 Ninja: windows msvc: create for each target a .pdb file
...
d662dff Fix shadowed variable warning on dashboard results
f66e735 Fix compiler warning reported on older Borland dashboard.
d90eed4 Fix compiler error reported on older Borland dashboard.
8233636 Update the documentation regarding INCLUDE_DIRECTORIES.
d899eb7 Call ExpandVariablesInString for each target's INCLUDE_DIRECTORIES
c21db87 Make search paths ordered and unique
22021f0 Remove cmMakefile::GetIncludeDirectories
9106b56 Extract and use the INCLUDE_DIRECTORIES target properties.
840509b Keep the INCLUDE_DIRECTORIES target property up to date.
a4d5f7b Add API to get the ordered includes for a target.
8adaee2 CMake: Eliminate cmMakefile::IncludeDirectories
7620932 Remove include flags memoization.
97a5faa Make it safe to call this method without creating duplicates.
edd5303 Refactor GetIncludeFlags to take includes instead of fetching them
Eliminate callers of cmMakefile::GetIncludeDirectories.
All callers of GetIncludeDirectories should go through the local generator
object.
Only the local generator calls cmTarget::GetIncludeDirectories directly.
d4b77eb Avoid discovering system infos for documentation. Adding some path is enough.
9002f73 Fix non existent std::string::clear on VS6
02ccb32 Create getDocumentedModulesListInDir which may be used in other context.
24fbc28 Add missing section markup for CPackComponent
bafd8a9 Example of builtin variable documentation (i.e. only used in C++ source code).
543f1ad Make the load of script documentation more efficient and dynamic.
cdbd1a9 Fix another compiler warning due to a typo
52c53de Really avoid compiler warning about unused vars
37f90ed Calm down compiler warning about unused var
7c82b7f Fix potential bad memory access, thanks to Eike
62b589b Suppress unused var, beautify code, avoid 1 extra newline.
751713f Update bash completion file in order to handle new CPack doc options.
1629615 CPack Documentation extraction from CMake script begins to work
83e34dd Implement simple CMake script comment markup language.
c6a0169 CPack begin the implementation of --help-command* and --help-variables*
The approach taken by commit 8704525f (Reject directory names containing
'=', 2011-01-14) was perhaps too heavy-handed for avoiding the obscure
cases when '=' in the path fails due to limitations of Make syntax.
Only two CMake tests:
LinkDirectory
OutOfSource
fail when the path contains '=' and they cover obscure cases. Instead
of rejecting such paths outright just warn when the problem may occur.
CMake doesn't find Visual C++ Express and uses "NMake Makefiles"
generator by default when one calls cmake WITHOUT using the -G options.
Teach CMake to find VC Express to use it as the default generator just
like the commercial versions.
- Enhance extract doc parser. Seems robust now. The legacy
module documentation parser works as before ignoring
the new markup.
- Proof of concept for CPack (generic), CPack RPM and CPack Deb
generator for macro and variables.
Try cpack --help-command and cpack --help-variables
The '-E build build_dir' command was created and documented, but then
morphed into '--build build_dir' instead, ... and then the -E documentation
was never removed. This commit fixes that oversight.
Without this call, recent refactoring changes in the Visual
Studio generators yield no GUIDs saved in the cache. Putting
the SaveCache here *once* avoids scattering many calls to it
in specific generators.
59238dc Fix --find-package mode on Cygwin, where enable_language(RC) is called
98472e4 Require the current cmake version in --find-package mode
a6ccf3c Use $(CXXFLAGS) and $(LDFLAGS) in the --find-package test Makefile
4386918 Fix line length
7d69310 Only enable the test when using GNU make
3011149 Make the test harder by always having a space in the include dirs
ab57ff6 Make the --find-package test harder
626fc71 Much improved test, should now be executed on all UNIXes
ec6982d Disable any STATUS output in --find-package mode
e552ae7 Dont check for -isysroot and -mmacosx-version on OSX in --find-package mode
e589589 Rename helper macros print_compile_flags() to set_compile_flags_var()
aecfc1f Fix test on OpenBSD with BSD make
6bb4ca3 The makefile for the test was kindof wrong
fd15b5e Only run the test if we are using a makefile generator under UNIX
9fc87c6 Add a test for the new --find-package mode
d3ae0ff Improve documentation for --find-package mode
bf07375 Add a cmake.m4 for using cmake in autoconf projects instead of pkgconfig
b0e3578 Use the file-utility to test for 64bit if there is no /usr/lib64
53edfb2 Better support for lib64 and Debian multiarch
b8fdaa1 Fix copyright notice in new CMakeFindPackageMode.cmake
7690edf Replace cmake::GetScriptMode() with GetWorkingMode()
e4f603b Implement find-package mode of cmake
a91d662 Add find-package mode, which does nothing yet
b976e70 Make clLocalGenerator::GetTargetFlags() public
set_property() has APPEND, which creates a list. E.g. when
appending to COMPILE_FLAGS a string is needed, not a list.
With the APPEND_STRING option the value is append as string,
not as list.
Alex
In find-package mode, cmake executes Modules/CMakeFindPackage.cmake,
which calls find_package(), and this is then evaluated in cmake.cxx,
which prints an appropriate message to stdout, so it can be used
e.g. in a normal Makefile:
$ /opt/cmake-HEAD/bin/cmake --find-package -DNAME=JPEG
-DCOMPILER_ID=GNU -DLANGUAGE=C -DMODE=EXIST
JPEG found.
$ /opt/cmake-HEAD/bin/cmake --find-package -DNAME=JPEG
-DCOMPILER_ID=GNU -DLANGUAGE=C -DMODE=COMPILE
$ /opt/cmake-HEAD/bin/cmake --find-package -DNAME=JPEG
-DCOMPILER_ID=GNU -DLANGUAGE=C -DMODE=LINK
-rdynamic -ljpeg
Alex
08fa5dd Also generate dependers-graphviz files.
4f96a76 GRAPHVIZ_IGNORE_TARGETS is now a list of regular expressions
5698ad2 Make it possible to exlude external libs from dot files
The curses dialog (ccmake) allows variables to be specified on the
command line. If any of these variables is used during any configure
iteration or during generate we must not warn about it.
The Qt dialog (cmake-gui) allows variables to be added and removed in
the GUI interactively. If a variable is added, removed, and then added
again we must still warn if it is unused.
With this commit, the --graphviz option now also generates dot files
which show which other targets depend on some target.
So, now there is
* a global dot-file which shows all targets and dependencies
* a dot file which shows on what a target Foo depends
* a dot file which shows which other targets depend on Foo
Alex
8b143fa Condense parsing of cache entries
122ebf1 Support manual cache entries
90abc3a Use cmCacheManager to load entries from the cache
6fe8624 Fix parsing of cache variables without a type
The big all-in-one file is basically unusable for e.g. kdelibs, it contains
around 1000 nodes and the created image is huuuuge !
Too big actually to be displayable or viewable or comprehensable.
Alex
Visual Studio Express editions do not support solution folders,
so default behavior should be as if USE_FOLDERS global property
is OFF.
Also, allow folder names to be the same as target names: internally,
use a prefix to distinguish folder GUIDs from target GUIDs. Add
a target and folder with the same name in the ExternalProject
test to exercise this code.
For CMake itself, provide a new option CMAKE_USE_FOLDERS that
defaults to ON so that Visual Studio users get a nicely organized
CMake project. Express edition users will have to turn off the
CMAKE_USE_FOLDERS option in order to build CMake in the VS Express
IDE.
OK, on windows 7 after we untar some files,
sometimes we can not rename the directory after
the untar is done. This breaks the external project
untar and rename code. So, by default we will wait
1/10th of a second after the untar. If CMAKE_UNTAR_DELAY
is set in the env, its value will be used instead of 100.
This work was started from a patch by Thomas Schiffer.
Thanks, Thomas!
See the newly added documentation of the FOLDER target
property for details.
Also added global properties, USE_FOLDERS and
PREDEFINED_TARGETS_FOLDER. See new docs here, too.
By default, the FOLDER target property is used to organize
targets into folders in IDEs that have support for such
organization.
This commit adds "solution folder" support to the Visual
Studio generators. Currently works with versions 7 through
10.
Also, use the new FOLDER property in the ExternalProject
test and in the CMake project itself.
This is especially important for the Visual Studio 10
generator and its quirky current working directory
behavior.
Also, emit more information about exactly what files are
out of date when cmakeCheckStampFile returns false.
Commit 02f7cfbc (Need to remove the MAKEFLAGS when cmake starts,
2003-05-13) removed the MAKEFLAGS environment variable when CMake starts
to prevent try_compile() from inheriting "make -i". This is unnecessary
in script mode (cmake -P). Instead remove the variable only when
configuring a project.
The Eclipse and KDevelop generators set the VERBOSE environment variable to
TRUE in the project files, because they must be able to "see" the full
command lines and errors, otherwise they can't parse the errors. But the
VERBOSE env.var. also enables cmakes own verbose output, which can be quite
long. This commit introduces an environment variable CMAKE_NO_VERBOSE, which
when set disables cmake's verbose output also when VERBOSE is set. This
env.var is now set by both the Eclipse and the KDevelop generators.
Alex
The DumpDocumentation executable and some supporting code and tests were
completely unused by CMake. Generation of documentation is done by the
individual executables with --help* options. In this commit we simply
remove the unused code, executable, and test.
Versioned UNIX libraries and executables produce multiple names for a
single target using one of
cmake -E cmake_symlink_library
cmake -E cmake_symlink_executable
to create symlinks to the real file for the extra names. However, when
cross-compiling from Windows to Linux we cannot create symlinks. This
commit teaches CMake to make copies instead of symbolic links when
running on windows. While this approach does not produce exactly what
Linux wants to see, at least the build will complete and the binary will
run on the target system. See issue #9171.
We factor the implementation of
cmake -E cmake_symlink_library
cmake -E cmake_symlink_executable
out of cmake::ExecuteCMakeCommand into methods
cmake::SymlinkLibrary
cmake::SymlinkExecutable
plus a helper method cmake::SymlinkInternal.
The commit "Really fix color check for dependency scanning" disabled
color unless "make COLOR=ON" is specified. This restores the previous
default behavior when CMAKE_COLOR_MAKEFILE is ON while retaining the
previous commit's fix. See issue #9680.
The commit "Fix color check for dependency scanning" was meant to
disable color if CMAKE_COLOR_MAKEFILE was off. It did remove use of the
activation option '--color' but it failed to make the default false when
the option was missing. This commit corrects that. See issue #9680.
This converts the CMake license to a pure 3-clause OSI-approved BSD
License. We drop the previous license clause requiring modified
versions to be plainly marked. We also update the CMake copyright to
cover the full development time range.
The commit "Remove barely-used cmMakefile::AddCacheDefinition" removed
all but one use of the cmCacheManager method 'bool' overload. This
commit removes the other use and the entire method, thus reducing code
duplication.
When CMake is invoked by the VS IDE re-run rule we compute whether or
not CMake really needs to re-run based on some timestamp helper files.
Previously we assumed that if the main generate.stamp file exists then
VS has correctly detected that the file is out of date. However, this
assumption is too aggressive and re-runs CMake unnecessarily sometimes.
This commit removes the assumption and always checks timestamps itself.
The change breaks the explicit user re-run request (R-click -> Compile)
but only in cases when the build system is already up to date.
All global generator CreateLocalGenerator methods automatically
initialize the local generator instances with SetGlobalGenerator. In
several places we were calling SetGlobalGenerator again after receiving
the return value from CreateLocalGenerator. The double-initializations
leaked the resources allocated by the first call to SetGlobalGenerator.
This fix removes the unnecessary calls.
This extends the "-E" command line mode with a "rename old new"
signature. The new command atomically renames a file or directory
within a single disk volume.
This creates global property RULE_MESSAGES which can be set to disbale
per-rule progress and action reporting. On Windows, these reports may
cause a noticable delay due to the cost of starting extra processes.
This feature will allow scripted builds to avoid the cost since they do
not need detailed information anyway. This replaces the RULE_PROGRESS
property created earlier as it is more complete. See issue #8726.
This creates global property RULE_PROGRESS which can be set to disbale
per-rule progress reporting. On Windows, progress reports may cause a
noticable delay due to the cost of starting an extra process. This
feature will allow scripted builds to avoid the cost since they do not
need detailed progress anyway. See issue #8726.
This moves the version numbers into an isolated configured header so
that not all of CMake needs to rebuild when the version changes.
Previously we had spaces, dashes and/or the word 'patch' randomly chosen
before the patch number. Now we always report version numbers in the
traditional format "<major>.<minor>.<patch>[-rc<rc>]".
We still use odd minor numbers for development versions. Now we also
use the CCYYMMDD date as the patch number of development versions, thus
allowing tests for exact CMake versions.
This cleans up the 'cmake --build' command-line interface:
- Rename --clean to --clean-first to better describe it.
- Replace --extra-options with a -- separator to simplify passing of
multiple native build tool options.
- Document the options in the main CMake man page description of the
--build option, and shares this with the usage message.
- Require --build to be the first argument when present.
- Move implementation into cmakemain where it belongs.
This teaches the helper commands 'cmake -E cmake_symlink_executable' and
'cmake -E cmake_symlink_library' to remove broken symlinks before
creating a symlink and report an error when the symlink cannot be
created. See issue #8654.
This defines global, directory, and target properties
RULE_LAUNCH_COMPILE, RULE_LAUNCH_LINK, and RULE_LAUNCH_CUSTOM. Their
values specify 'launcher' command lines which are prefixed to compile,
link, and custom build rules by Makefile generators.
When testing whether to re-run CMake, a byproduct may be a symlink. If
so, the existence of the link is important rather than the link's
target. See issue #8465.
App Bundle and Framework directories, symlinks, and Info.plist files we
create during generation are byproducts, not outputs. We should re-run
CMake only when they are missing, not when they are old.
See issue #8465.
This teaches cmMakefile::GetProperty and cmake::GetProperty methods to
return NULL when the property name is NULL, making them more robust and
consistent with the behavior of cmTarget::GetProperty.